I have read where the installation of MS04-011 can cause issues with slow logons and that imcide.sys, along with a Nortel and DLT tape driver, could be the culprit. I have searched all over trying to find out what this driver is for and all I can find are articles relating to the patch.

Does anyone know what this driver is for or where I can find more information on it?

According to M$, this problem only occurs on W2K boxes and only after the patch has been installed.